Molecule N2o4 has a greater entropy than NO2

'Two moles of a substance at temperature T and pressure p has twice the entropy of one mole of the same substance at the same temperature and pressure.'
--> Is it because the number of moles doesn't matter. Why doesn't it?

Why is this statement true?

'The entropy change for the reaction N2O4(g) -> 2 NO2(g) is positive.'
--> The molecule N2o4 has a greater entropy than NO2, so it delta S, change in entropy would be entropy of NO2 - entropy of N2O4, which would be a negative (smaller - bigger number)? Am I going about this wrong?